1 /*
2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2016 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #ifndef CPU_S390_VM_C1_LINEARSCAN_S390_HPP
27 #define CPU_S390_VM_C1_LINEARSCAN_S390_HPP
28
is_processed_reg_num(int reg_num)29 inline bool LinearScan::is_processed_reg_num(int reg_num) {
30 // unallocated: Z_thread, Z_fp, Z_SP, Z_R0_scratch, Z_R1_scratch, Z_R14
31 assert(FrameMap::Z_R14_opr->cpu_regnr() == 10, "wrong assumption below");
32 assert(FrameMap::Z_R0_opr->cpu_regnr() == 11, "wrong assumption below");
33 assert(FrameMap::Z_R1_opr->cpu_regnr() == 12, "wrong assumption below");
34 assert(FrameMap::Z_R8_opr->cpu_regnr() == 13, "wrong assumption below");
35 assert(FrameMap::Z_R9_opr->cpu_regnr() == 14, "wrong assumption below");
36 assert(FrameMap::Z_R15_opr->cpu_regnr() == 15, "wrong assumption below");
37 assert(reg_num >= 0, "invalid reg_num");
38 return reg_num <= FrameMap::last_cpu_reg() || reg_num >= pd_nof_cpu_regs_frame_map;
39 }
40
num_physical_regs(BasicType type)41 inline int LinearScan::num_physical_regs(BasicType type) {
42 // IBM Z requires one cpu registers for long,
43 // and one fpu register for double.
44 return 1;
45 }
46
requires_adjacent_regs(BasicType type)47 inline bool LinearScan::requires_adjacent_regs(BasicType type) {
48 return false;
49 }
50
is_caller_save(int assigned_reg)51 inline bool LinearScan::is_caller_save(int assigned_reg) {
52 assert(assigned_reg >= 0 && assigned_reg < nof_regs, "should call this only for registers");
53 return true; // No callee-saved registers on IBM Z.
54 }
55
pd_add_temps(LIR_Op * op)56 inline void LinearScan::pd_add_temps(LIR_Op* op) {
57 // No special case behaviours.
58 }
59
pd_init_regs_for_alloc(Interval * cur)60 inline bool LinearScanWalker::pd_init_regs_for_alloc(Interval* cur) {
61 return false; // No special case behaviours.
62 }
63
64 #endif // CPU_S390_VM_C1_LINEARSCAN_S390_HPP
65